Its not a mod or a texture, its an addon for the lucky block mod.in your .minecraft folder you need 2 folders, (when forge is installed) in the "mods" folder you need the lucky block mod, the loot++ mod and potioncore. (so 3 mods)then you need a "addons" folder, and inside there an "lucky_block" folder, inside this "lucky_block" folder you can just add the downloaded lucky block addon (like this tnt lucky block) then start your game and play! :) (I can make a video about this, if it would help)

Could you make them craftable with sand and gunpowder instead of redstone, I feel that it would be a little more fitting for the whole TNT theme, or just make it craftable with a lucky block and TNT. Here is an idea. (G=gunpowder L=lucky block S=Sand)

G S G

S L S

G S G

Then again, this is just a suggestion, the mod is fine as it is, but I feel like this would make a little more sense.